{"instruction": "You are an expert in event argument extraction. Please extract event arguments and their roles from the input that conform to the schema definition, which already includes event trigger words. If an argument does not exist, return NAN or an empty dictionary. Please respond in the format of a JSON string.", "schema": [{"event_type": "discover vulnerability", "arguments": ["supported platform", "time", "discoverer", "capabilities", "vulnerability", "vulnerable system version", "vulnerable system", "common vulnerabilities and exposures", "vulnerable system owner"]}], "input": "The vulnerability lay in the certificate pinning technology , a security mechanism used to prevent impersonation attacks and use of fraudulent certificates by only accepting certificates signed by a single pinned CA root certificate ."}
{"discover vulnerability": [{"supported platform": "NAN", "time": "NAN", "discoverer": "NAN", "capabilities": "NAN", "vulnerability": "The vulnerability", "vulnerable system version": "NAN", "vulnerable system": "the certificate pinning technology", "common vulnerabilities and exposures": "NAN", "vulnerable system owner": "NAN"}]}